ShadowReference
ShadowReference
Data & JSON

YAML Validator

Free online tool · runs in your browser

Validate and format YAML.

…

Quick tutorial

  1. 1Paste YAML.
  2. 2Click Validate or Format.

Free online yaml validator

Validate YAML syntax and optionally format it. Paste a manifest or config, click Validate, and fix parse errors before they hit CI. This YAML checker runs locally with js-yaml. Complex anchors and custom tags may have limited round-trip support when formatting.

How to use YAML Validator

  1. Paste YAML.
  2. Click Validate or Format.

Limitations

  • Complex YAML features may have limited round-trip support.

Example

Input

key: value

Output

Valid YAML ✓

FAQ

Frequently Asked Questions

Is this a YAML linter or just a parser?

It checks that the document parses. It does not enforce a Kubernetes or GitHub Actions schema.

How do I convert YAML to JSON?

Use the JSON ↔ YAML converter for bidirectional conversion.

JSON vs YAML?

Use JSON ↔ YAML tool for conversion.

Is YAML Validator free to use?

Yes. YAML Validator on ShadowReference is free, with no account, no watermarks, and no server-side processing.

Does this tool send my data to a server?

No. All processing happens locally in your browser. Your input never leaves your device.

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